The Drosophila mutant AtpαCJ10 (CJ10) carries an amino acid change (G744S) affecting glycine 744 in Atpα, which is conserved as glycine 755 in ATP1A3 and mutated to G755A, G755C, G755S and G755V in patients with AHC (Sasaki et al., 2014; Viollet et al., 2015). The gene discussed is ATP1A3; the disease is alternating hemiplegia of childhood.